Bug 14626 - Error: Garbage collector could not allocate 524288 bytes of memory for major heap section.
Summary: Error: Garbage collector could not allocate 524288 bytes of memory for major ...
Alias: None
Product: Runtime
Classification: Mono
Component: GC ()
Version: unspecified
Hardware: PC Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2013-09-10 22:34 UTC by hui
Modified: 2017-07-07 21:07 UTC (History)
5 users (show)

Is this bug a regression?: ---
Last known good build:

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Description hui 2013-09-10 22:34:53 UTC
My program has been terminated, the exception information is "Error: Garbage collector could not allocate 524288 bytes of memory for major heap section".

Can I modify the source code?

souce:/ metadata / sgen-memory-governor.c

sgen_assert_memory_alloc (void *ptr, size_t requested_size, const char *assert_description)
	if (ptr || !assert_description)
	fprintf (stderr, "Error: Garbage collector could not allocate %zu bytes of memory for %s.\n", requested_size, assert_description);
	// exit (1); 

I want to get more detailed information about how to do it?

Mono JIT compiler version 3.0.6
OS: CentOs 6.3
Comment 1 hui 2013-09-10 22:46:37 UTC
I am hoping to get the OutOfMemoryException, how to do it?
Comment 2 Zoltan Varga 2013-09-11 05:44:17 UTC
Our OutOfMemoryException generation is not very good, we usually assert instead of throwing it.
Comment 3 hui 2013-09-11 06:03:47 UTC
I see.
Comment 4 Rodrigo Kumpera 2013-09-12 10:36:36 UTC
You can force a heap size limit so you can get a nicer OOM exception. See mono's man page for further information.
Comment 5 hui 2013-09-13 03:49:53 UTC
Comment 6 hui 2013-09-22 06:29:38 UTC
I Tied
export MONO_GC_PARAMS="major=marksweep-fixed,major-heap-size=2g"

How do I know the modified configuration has been successful?
Comment 7 Rodrigo Kumpera 2013-09-22 20:36:41 UTC
Enable GC logging by passing MONO_LOG_LEVEL=debug.

What you did is not set a max heap size, but use the fixed heap collector. You should use the max-heap-size option instead.
Comment 8 hui 2013-09-23 02:48:28 UTC
Ah, I did not find this parameter in the mono's man page.

I set "max-heap-size" to how much?

PC-Memory is 8G.
Comment 9 Rodrigo Kumpera 2014-01-17 14:51:57 UTC
Se to how much you think your app need. You can use k, m and g suffixes when specifying sizes.
Comment 10 Ludovic Henry 2017-07-07 21:07:31 UTC
Can you still reproduce this bug with latest version of mono? Please feel free to reopen if that is still the case. Thank you.